Transformer Core Ground Current Sensor

Abstract

The utility model provides a transformer core grounding current sensor, including a front shell assembly, a rear shell assembly, a clamping mechanism, an open-type current transformer, and a processing module. When in use, the front shell assembly and the rear shell assembly are matched on both sides of the transformer core grounding flat steel, so that the grounding flat steel passes through the avoidance space, and the grounding flat steel passes through the first core and the second core of the open-type current transformer, and then the clamping plate and the connecting plate are connected together through a connecting unit, so that the current sensor is fixed on the grounding flat steel. The front shell assembly is composed of a front shell body, a first cover plate and a sealing gasket. The opening of the first accommodating cavity is sealed by the first cover plate and the sealing gasket, which can prevent rainwater from entering the first accommodating cavity through the gap. The sealing is high, which can ensure the stable operation of various electronic components inside the first accommodating cavity, and provide guarantee for the real-time detection of the transformer core grounding current.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformer grounding current detection, and in particular relates to a transformer iron core grounding current sensor. Background Art

[0002] The electricity generated by the power plant will first be increased in voltage through a step-up transformer to reduce energy loss on the transmission line, and then transmitted to users far away from the power plant, and then the voltage will be reduced by a step-down transformer for use by users. The power transformer is one of the core components of the power system. The safe and reliable operation of the transformer is directly related to the stability of the entire power grid. Core grounding fault is one of the most common problems of transformers. When a grounding fault occurs in the core, the grounding current of the core will increase significantly, seriously threatening the reliable operation of the transformer and the power grid. Therefore, during daily inspections, it is necessary to detect the core grounding current of the transformer so that it can be discovered and resolved in time when a grounding fault occurs.

[0003] Normally, inspectors need to use a clamp ammeter to manually detect the current data of the core grounding lead or flat steel. However, this method not only has limited accuracy, but also poses safety risks during operation and cannot guarantee continuous real-time monitoring. In the prior art, there are current sensors fixedly installed on the grounding flat steel, which can monitor the changes in current values ​​in real time. Since the current accuracy detected by the sensor is at the milliampere level, the internal electronic components have high precision. For transformers installed outdoors, the environment they are in is relatively harsh, and the sealing performance of the sensor housing cannot be guaranteed. When it rains outdoors, it is easy for water to enter the sensor, resulting in short circuits and other faults. Utility Model Content

[0004] The utility model provides a transformer iron core grounding current sensor, aiming to solve the problem of poor sealing performance of an outer shell of the iron core grounding current sensor in the prior art.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a transformer core grounding current sensor, comprising:

[0006] A front housing assembly, comprising a front housing, a first cover plate and a sealing gasket, wherein the front housing has a first accommodating cavity, one side of the first accommodating cavity is open, the sealing gasket is annular and is arranged around the opening side of the first accommodating cavity, and the first cover plate is arranged to cover the side of the sealing gasket away from the front housing;

[0007] A rear housing assembly, comprising a rear housing and a second cover plate, wherein the rear housing is detachably connected to the front housing and encloses the front housing to form an escape space for the flat steel to pass through, the rear housing having a second accommodating cavity, one side of the second accommodating cavity is open, and the second cover plate is arranged to cover the open side of the second accommodating cavity;

[0008] The clamping mechanism comprises a connecting plate, a clamping plate, and a connecting unit, wherein the connecting plate is arranged on one of the front housing or the rear housing, the connecting plate is located on one side of the avoidance space, the clamping plate and the connecting plate are arranged at a distance, a clamping space for the flat steel to pass through is formed between the clamping plate and the connecting plate, and the connecting unit is detachably connected between the connecting plate and the clamping plate;

[0009] A split-type current transformer comprises a first iron core and a second iron core, wherein the first iron core is arranged in the first accommodating cavity, the second iron core is arranged in the second accommodating cavity, and a coil is wound around the first iron core; and

[0010] The processing module includes a power supply and a processor respectively arranged in the first accommodating cavity, and the power supply and the coil are respectively electrically connected to the processor.

[0011] In a possible implementation, a first slot body penetrating from top to bottom is formed on one side of the front shell body, and a second slot body penetrating from top to bottom is formed on one side of the rear shell body. The first slot body and the second slot body are matched to form the avoidance space, and the first iron core corresponds to the recessed setting of the first slot body, and the second iron core corresponds to the recessed setting of the second slot body.

[0012] In a possible implementation, the front shell and the first cover plate are detachably connected via screws, and the sealing gasket has avoidance holes that penetrate through the sealing gasket in a thickness direction, and the avoidance holes correspond to the screws one by one.

[0013] In a possible implementation, the first accommodating cavity is divided into a first chamber and a second chamber by a partition, the first iron core is arranged in the first chamber, the power supply and the processor are respectively arranged in the second chamber, a wire threading groove is opened on the partition, and the sealing gasket includes a first gasket arranged around the opening side of the first chamber, and a second gasket arranged around the opening side of the second chamber.

[0014] In a possible implementation, the first gasket and the second gasket are respectively silicone gaskets.

[0015] In a possible implementation, a plurality of positioning protrusions are provided on a side of the first cover plate adjacent to the front shell, the plurality of positioning protrusions are arranged along the circumference of the first chamber and the second chamber, the positioning protrusions include a cylindrical positioning column and a limiting head provided at an end of the positioning column, the diameter of the limiting head is larger than the positioning column, and the height of the limiting head is adapted to the thickness of the silicone pad;

[0016] The first gasket and the second gasket are respectively provided with a plurality of positioning holes, the positioning posts are passed through the corresponding positioning holes, and the diameter of the positioning holes is smaller than the diameter of the limiting head;

[0017] A plurality of accommodating holes are formed on the end surface of the opening side of the first accommodating cavity. The accommodating holes correspond to the limiting heads one by one, and the diameter of the accommodating holes is greater than the diameter of the limiting heads.

[0018] In a possible implementation, the opening sides of the first accommodating cavity and the second accommodating cavity are respectively arranged at the bottom, and the upper surfaces of the front shell and the rear shell both have a flow guide slope.

[0019] In a possible implementation, the transformer core grounding current sensor also includes a wireless communication component, which includes an antenna disposed on the front shell, the antenna is communicatively connected to the processor, the front shell has a mounting hole, and the fixed end of the antenna is disposed in the mounting hole.

[0020] In a possible implementation manner, a sealing ring is provided between the fixed end of the antenna and the mounting hole.

[0021] In a possible implementation, the transformer core grounding current sensor further includes a switch button, which is disposed on the front housing and is communicatively connected to the processor.

[0022] Compared with the prior art, the transformer core grounding current sensor provided by the utility model has the following beneficial effects:

[0023] The transformer core grounding current sensor provided by the utility model comprises a front shell component, a rear shell component, a clamping mechanism, an open-type current transformer, and a processing module. When in use, the front shell component and the rear shell component are matched on both sides of the transformer core grounding flat steel (or grounding wire), so that the grounding flat steel (or grounding wire) passes through the avoidance space, and the grounding flat steel (or grounding wire) passes between the first core and the second core of the open-type current transformer, and then the clamping plate and the connecting plate are connected together through the connecting unit, so that the current sensor is fixed on the grounding flat steel (or grounding wire). In this way, when the grounding current changes, the open-type current transformer can generate an induction signal, and then transmit the induction signal to the processor. The processor can obtain the current change after processing and analysis, thereby realizing real-time detection of the grounding current. In the utility model, the front shell assembly is composed of a front shell body, a first cover plate and a sealing gasket. The power supply, the first iron core wound with a coil, the processor and other electronic components are installed in the first accommodating cavity. The opening of the first accommodating cavity is sealed by the first cover plate and the sealing gasket, which can prevent rainwater from entering the first accommodating cavity through the gap. The sealing performance is high, which can ensure the stable operation of various electronic components inside the first accommodating cavity, and provide guarantee for the real-time detection of the grounding current of the iron core of the outdoor transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a transformer core grounding current sensor provided by one of the embodiments of the utility model;

[0025] Figure 2 A schematic diagram of the structure of a transformer core grounding current sensor provided by one embodiment of the utility model after the first cover plate, the sealing gasket and the second cover plate are hidden;

[0026] Figure 3 An exploded schematic diagram of a transformer core grounding current sensor provided by one embodiment of the utility model;

[0027] Figure 4 This is a schematic structural diagram of a first cover plate and a sealing gasket in one embodiment of the utility model;

[0028] Figure 5 It is a partial matching schematic diagram of the first cover plate, the sealing gasket and the front housing in one embodiment of the utility model.

[0029] Description of reference numerals:

[0030] 1. Transformer core grounding current sensor; 10. Front shell assembly; 11. Front shell; 111. First slot; 112. Partition; 1121. Threading slot; 113. Accommodating hole; 114. Mounting hole; 12. First cover; 121. Positioning protrusion; 1211. Positioning column; 1212. Limiting head; 13. Sealing pad; 131. First gasket; 1311 Avoidance hole; 1312. Positioning hole; 132. Second gasket; 14. Screw; 20. Rear shell assembly; 21. Rear shell; 211. Second slot; 22. Second cover; 30. Clamping mechanism; 31. Connecting plate; 32. Clamping plate; 33. Connecting unit; 40. Open-and-close current transformer; 41. First core; 42. Second core; 50. Processing module; 51. Power supply; 52. Processor; 60. Antenna; 70. Switch button. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] It should be noted that when an element is referred to as being "fixed to", "fixed" or "fixedly disposed" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" or "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. When an element is referred to as being "set to" or "disposed on" another element, it may be directly on the other element or there may be a central element. "Multiple" refers to two or more quantities. "At least one" refers to one or more quantities. "Several" refers to one or more quantities.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0034] Please also read Figures 1 to 5 , the transformer core grounding current sensor 1 provided in an embodiment of the utility model is described below.

[0035] See also Figures 1 to 3The utility model embodiment provides a transformer core grounding current sensor 1, including a front shell component 10, a rear shell component 20, a clamping mechanism 30, an open-close current transformer 40, and a processing module 50. The front shell component 10 includes a front shell 11, a first cover plate 12 and a sealing gasket 13. The front shell 11 has a first accommodating cavity, one side of the first accommodating cavity is open, the sealing gasket 13 is annular and is arranged around the opening side of the first accommodating cavity, and the first cover plate 12 is arranged on the side of the sealing gasket 13 away from the front shell 11; the rear shell component 20 includes a rear shell 21 and a second cover plate 22. The rear shell 21 is detachably connected to the front shell 11 and is enclosed with the front shell 11 to form an avoidance space for flat steel to pass through. The rear shell 21 has a second accommodating cavity, one side of the second accommodating cavity is open, and the second cover plate 22 covers the On the opening side of the second accommodating cavity; the clamping mechanism 30 includes a connecting plate 31, a clamping plate 32, and a connecting unit 33, the connecting plate 31 is arranged on one of the front shell 11 or the rear shell 21, the connecting plate 31 is located on one side of the avoidance space, the clamping plate 32 and the connecting plate 31 are spaced apart, and a clamping space for the flat steel to pass through is formed between the clamping plate 32 and the connecting plate 31, and the connecting unit 33 is detachably connected between the connecting plate 31 and the clamping plate 32; the open-close current transformer 40 includes a first iron core 41 and a second iron core 42, the first iron core 41 is arranged in the first accommodating cavity, the second iron core 42 is arranged in the second accommodating cavity, and a coil is wound on the first iron core 41; the processing module 50 includes a power supply 51 and a processor 52 respectively arranged in the first accommodating cavity, and the power supply 51 and the coil are electrically connected to the processor 52 respectively.

[0036] In practical applications, the introduction of transformer core grounding current monitoring devices has greatly improved the operational safety of the power system. Through continuous observation of the grounding current, a series of problems such as insulation damage and oil deterioration caused by core overheating can be effectively prevented. This not only reduces maintenance costs, but also ensures the reliability and stability of power supply. Compared with the prior art, the transformer core grounding current sensor 1 provided by the utility model has the following beneficial effects:

[0037] The transformer core grounding current sensor 1 provided by the utility model comprises a front shell component 10, a rear shell component 20, a clamping mechanism 30, an open-close current transformer 40, and a processing module 50. When in use, the front shell component 10 and the rear shell component 20 are matched on both sides of the transformer core grounding flat steel (or grounding wire), so that the grounding flat steel (or grounding wire) passes through the avoidance space, and the grounding flat steel (or grounding wire) passes between the first core 41 and the second core 42 of the open-close current transformer 40, and then the clamping plate 32 and the connecting plate 31 are connected together through the connecting unit 33, so that the current sensor is fixed on the grounding flat steel (or grounding wire). In this way, when the grounding current changes, the open-close current transformer 40 can generate an induction signal, and then transmit the induction signal to the processor 52. The processor 52 can obtain the current change through processing and analysis, thereby realizing real-time detection of the grounding current. In the utility model, the front shell assembly 10 is composed of a front shell body 11, a first cover plate 12 and a sealing gasket 13. Electronic components such as a power supply 51, a first iron core 41 wound with a coil, and a processor 52 are installed in the first accommodating cavity. The opening of the first accommodating cavity is sealed by the first cover plate 12 and the sealing gasket 13, which can prevent rainwater from entering the first accommodating cavity through the gap. The sealing performance is high, which can ensure the stable operation of various electronic components inside the first accommodating cavity, and provide protection for the real-time detection of the grounding current of the iron core of the outdoor transformer.

[0038] In the present utility model, the front housing 11 and the rear housing 21 are made of Permalloy material, and the front housing 11 and the rear housing 21 are matched to form an escape space for the grounding flat steel to pass through. The first iron core 41 and the second iron core 42 are respectively arranged in the front housing 11 and the rear housing 21, so that when the grounding flat steel passes the current, the first iron core 41 and the second iron core 42 can generate an induced current. It should be noted that the technology of the open-close current transformer 40 for detecting the grounding current belongs to the prior art. When the present utility model is applied, the existing open-close current transformer 40, processor 52 and power supply 51 on the market can be directly selected, and there is no restriction on its specific specifications, models, working ranges, etc., and it can be selected according to the actual working conditions.

[0039] An annular sealing gasket 13 is provided between the front shell 11 and the first cover plate 12. The shape of the sealing gasket 13 is adapted to the opening shape of the first accommodating cavity. The sealing gasket 13 can be a silicone gasket, a rubber gasket, a metal sealing gasket or other composite gaskets, as long as it can play a role of sealing and waterproofing. The first cover plate 12 and the front shell 11 can be connected and fixed by bolt connection, binding tape, gluing, etc. The rear shell assembly 20 includes a rear shell 21 and a second cover plate 22. Since only the second iron core 42 is provided in the rear shell 21, the waterproof performance requirement is not high and a sealing gasket may not be provided. The rear shell 21 and the second cover plate 22 can be connected by bolts, binding tape, gluing, etc.

[0040] The clamping mechanism 30 is used to clamp and fix the sensor on the grounded flat steel. The clamping mechanism 30 includes a connecting plate 31, a clamping plate 32 and a connecting unit 33. The connecting plate 31 is fixedly arranged on the front housing 11 or the rear housing 21, and can be integrally connected with the front housing 11 or the rear housing 21, or can be fixed as a whole by gluing, screws 14, etc. The clamping plate 32 is detachably connected to the connecting plate 31 through the connecting unit 33, and the clamping plate 32 and the connecting plate 31 can clamp the grounded flat steel. The connecting unit 33 can be a bolt, a magnet, a cable tie, etc.

[0041] The processing module 50 includes a power supply 51 and a processor 52. The power supply 51 can be a lithium battery with a long service life. When the battery is exhausted, the battery can be replaced or taken out for charging. The grounding current of the transformer core will be converted into an applicable current signal through a current transformer. The processor 52 collects the current of the current transformer in real time through an A / D chip, performs Fourier transform, separates the signal quantities of different frequencies, and sends them to the console through a wireless transmission module.

[0042] It should be noted that during installation, the transformer (reactor) core or clamp grounding wire should pass through the current sensor, and all core grounding wires and clamp grounding wires of a single transformer (reactor) should be equipped with one current sensor each. When the main transformer core / clamp grounding wire is not connected to the main transformer shell, the current sensor needs to be installed close to the ground; when the main transformer core / clamp grounding wire is connected to the main transformer shell, the sensor needs to be installed above the connection point between the core / clamp grounding wire and the shell, and as far away from the connection point as possible.

[0043] See also Figures 1 to 3 In some possible embodiments, a first slot body 111 penetrating from top to bottom is formed on one side of the front shell body 11, and a second slot body 211 penetrating from top to bottom is formed on one side of the rear shell body 21. The first slot body 111 and the second slot body 211 are matched to form an escape space, and the first iron core 41 corresponds to the recessed setting of the first slot body 111, and the second iron core 42 corresponds to the recessed setting of the second slot body 211.

[0044] See also Figures 1 to 4 In some possible embodiments, the front housing 11 and the first cover plate 12 are detachably connected by screws 14, and the sealing gasket 13 has avoidance holes 1311 that penetrate through the thickness direction thereof, and the avoidance holes 1311 correspond to the screws 14 one by one. The screws 14 are easy to install and remove, and a plurality of screws 14 are provided, and the specific number and arrangement of the screws 14 are not limited, as long as the first cover plate 12 can be securely installed.

[0045] See also Figures 1 to 3In some possible embodiments, the first accommodating cavity is divided into a first chamber and a second chamber by a partition 112, the first iron core 41 is arranged in the first chamber, the power supply 51 and the processor 52 are respectively arranged in the second chamber, and a wire threading groove 1121 is opened on the partition 112, and the sealing gasket 13 includes a first gasket 131 arranged around the opening side of the first chamber, and a second gasket 132 arranged around the opening side of the second chamber.

[0046] In this embodiment, the first chamber is used to accommodate the first iron core 41, and the second chamber is used to accommodate the second iron core 42. After the first iron core 41 and the second iron core 42 are installed in place, the first chamber and the second chamber can be fixed by glue filling, which plays a dual role of fixing and waterproofing. The wiring terminal of the coil wound on the first iron core 41 is connected to the processor 52 through the threading groove 1121.

[0047] In some possible embodiments, the first gasket 131 and the second gasket 132 are respectively silicone gaskets. After the first cover plate 12 is installed, pressure can be applied to the silicone gaskets. The silicone gaskets have good sealing properties and are resistant to aging.

[0048] During installation, it is necessary to ensure that the edge of the sealing gasket 13 is aligned with the edge of the front housing 11. Since the sealing gasket 13 is annular, its edge is thin, and its texture is soft, it is not easy to place the sealing gasket 13 stably. Even if the sealing gasket 13 is placed in place, it may be skewed due to the influence of the first cover when the first cover is covered, which will affect the sealing effect. To solve the above problem, please refer to Figures 1 to 5 In some possible embodiments, a plurality of positioning protrusions 121 are provided on one side of the first cover plate 12 adjacent to the front shell body 11, and the plurality of positioning protrusions 121 are arranged along the circumference of the first chamber and the second chamber. The positioning protrusion 121 includes a cylindrical positioning column 1211 and a limiting head 1212 arranged at the end of the positioning column 1211, the diameter of the limiting head 1212 is larger than the positioning column 1211, and the height of the limiting head 1212 is adapted to the thickness of the silicone pad; the first gasket 131 and the second gasket 132 are respectively provided with a plurality of positioning holes 1312, the positioning columns 1211 are penetrated through the corresponding positioning holes 1312, and the diameter of the positioning holes 1312 is smaller than the diameter of the limiting head 1212; a plurality of accommodating holes 113 are provided on the end surface of the opening side of the first accommodating cavity, the accommodating holes 113 correspond one-to-one to the limiting heads 1212, and the diameter of the accommodating holes 113 is larger than the diameter of the limiting heads 1212.

[0049] like Figure 4 and Figure 5As shown, the purpose of setting the positioning protrusion 121 on the first cover plate 12 in this embodiment is to install and position the first gasket 131 and the second gasket 132 (collectively referred to as the sealing gasket 13), and to install the first cover plate 12 and the sealing gasket 13 together. During installation, the sealing gasket 13 is first fixed on the first cover plate 12, so that the positioning protrusion 121 passes through the silicone pad. Since the diameter of the limit head 1212 is larger than the diameter of the positioning hole 1312, the limit head 1212 can clamp the silicone pad to prevent it from falling. Then the first cover plate 12 and the front shell 11 are fixed together, so that the sealing gasket 13 can correspond to the edges of the first chamber and the second chamber, and the sealing gasket 13 is not easy to deviate, which can ensure the sealing effect.

[0050] In some possible embodiments, the opening sides of the first accommodating cavity and the second accommodating cavity are respectively arranged at the bottom, the upper surfaces of the front housing 11 and the rear housing 21 have a diversion slope, and the opening sides of the first accommodating cavity and the second accommodating cavity are respectively arranged at the bottom, so that water is not easy to enter. The top surfaces of the front housing 11 and the rear housing 21 are respectively provided with a diversion slope, so that rainwater will not accumulate.

[0051] See also Figure 1 and Figure 2 In some possible embodiments, the transformer core grounding current sensor 1 also includes a wireless communication component, which includes an antenna 60 disposed on the front shell 11. The antenna 60 is communicatively connected to the processor 52. The front shell 11 is provided with a mounting hole 114. The fixed end of the antenna 60 is disposed in the mounting hole 114. The antenna 60 can support a variety of communication protocols including the non-network protocol, and can realize remote transmission of data.

[0052] In some possible embodiments, a sealing ring is provided between the fixed end of the antenna 60 and the inner wall of the mounting hole 114 to prevent rainwater from entering the interior of the front housing 11 through the mounting hole 114 .

[0053] See also Figure 1 In some possible embodiments, the transformer core grounding current sensor 1 also includes a switch button 70, which is disposed on the front shell 11 and is communicatively connected to the processor 52. The on and off of the power supply 51 is controlled by the switch button 70. An indicator light can be set in the switch button 70 to indicate whether the power supply 51 is on and off.

[0054] It can be understood that the various parts in the above-mentioned embodiments can be freely combined or deleted to form different combination embodiments. The specific contents of each combination embodiment will not be repeated here. After this description, it can be considered that the utility model specification has recorded various combination embodiments and can support different combination embodiments.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Transformer core grounding current sensor, characterized in that: include: A front housing assembly, comprising a front housing, a first cover plate and a sealing gasket, wherein the front housing has a first accommodating cavity, one side of the first accommodating cavity is open, the sealing gasket is annular and is arranged around the opening side of the first accommodating cavity, and the first cover plate is arranged to cover the side of the sealing gasket away from the front housing; A rear housing assembly, comprising a rear housing and a second cover plate, wherein the rear housing is detachably connected to the front housing and encloses the front housing to form an escape space for the flat steel to pass through, the rear housing having a second accommodating cavity, one side of the second accommodating cavity is open, and the second cover plate is arranged to cover the open side of the second accommodating cavity; The clamping mechanism comprises a connecting plate, a clamping plate, and a connecting unit, wherein the connecting plate is arranged on one of the front housing or the rear housing, the connecting plate is located on one side of the avoidance space, the clamping plate and the connecting plate are arranged at a distance, a clamping space for the flat steel to pass through is formed between the clamping plate and the connecting plate, and the connecting unit is detachably connected between the connecting plate and the clamping plate; A split-type current transformer comprises a first iron core and a second iron core, wherein the first iron core is arranged in the first accommodating cavity, the second iron core is arranged in the second accommodating cavity, and a coil is wound around the first iron core; and The processing module includes a power supply and a processor respectively arranged in the first accommodating cavity, and the power supply and the coil are respectively electrically connected to the processor.

2. The transformer core grounding current sensor according to claim 1, characterized in that: A first slot body penetrating from top to bottom is formed on one side of the front shell body, and a second slot body penetrating from top to bottom is formed on one side of the rear shell body. The first slot body and the second slot body are matched to form the avoidance space. The first iron core corresponds to the recessed setting of the first slot body, and the second iron core corresponds to the recessed setting of the second slot body.

3. The transformer core grounding current sensor according to claim 1, characterized in that: The front housing and the first cover plate are detachably connected via screws, and the sealing gasket has avoidance holes that penetrate through the sealing gasket in its thickness direction, and the avoidance holes correspond to the screws one by one.

4. The transformer core grounding current sensor according to claim 1, characterized in that: The first accommodating chamber is divided into a first chamber and a second chamber by a partition, the first iron core is arranged in the first chamber, the power supply and the processor are respectively arranged in the second chamber, a wire threading groove is opened on the partition, and the sealing gasket includes a first gasket arranged around the opening side of the first chamber, and a second gasket arranged around the opening side of the second chamber.

5. The transformer core grounding current sensor according to claim 4, characterized in that: The first gasket and the second gasket are respectively silicone gaskets.

6. The transformer core grounding current sensor according to claim 5, characterized in that: A plurality of positioning protrusions are provided on one side of the first cover plate adjacent to the front shell, and the plurality of positioning protrusions are arranged along the circumference of the first chamber and the second chamber, and the positioning protrusions include a cylindrical positioning column and a limiting head provided at the end of the positioning column, the diameter of the limiting head is larger than the positioning column, and the height of the limiting head is adapted to the thickness of the silicone pad; The first gasket and the second gasket are respectively provided with a plurality of positioning holes, the positioning posts are passed through the corresponding positioning holes, and the diameter of the positioning holes is smaller than the diameter of the limiting head; A plurality of accommodating holes are formed on the end surface of the opening side of the first accommodating cavity. The accommodating holes correspond to the limiting heads one by one, and the diameter of the accommodating holes is greater than the diameter of the limiting heads.

7. The transformer core grounding current sensor according to claim 1, characterized in that: The opening sides of the first accommodating cavity and the second accommodating cavity are respectively arranged at the bottom, and the upper surfaces of the front shell and the rear shell both have a flow guide slope.

8. The transformer core grounding current sensor according to claim 1, characterized in that: The transformer core grounding current sensor also includes a wireless communication component, which includes an antenna arranged on the front shell, the antenna is communicatively connected to the processor, the front shell is provided with a mounting hole, and the fixed end of the antenna is arranged in the mounting hole.

9. The transformer core grounding current sensor according to claim 8, characterized in that: A sealing ring is provided between the fixing end of the antenna and the mounting hole.

10. The transformer core grounding current sensor according to claim 1, characterized in that: The transformer core grounding current sensor further includes a switch button, which is disposed on the front housing and is communicatively connected with the processor.

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